title: Lineage assays: which pathway to take?
abstract: The report by Ehrlich et al in this issue of Blood reveals that assigning lineage potential to hematopoietic progenitors can be a challenging task, with interpretations differing widely depending on which functional assays are used. The findings add a new angle to the controversy of how the lymphoid and myeloid lineages are related during normal differentiation of hematopoietic stem cells.
authors.affiliation: University of California Los Angeles, USA.
authors.forename: Gay M
authors.initials: GM
authors.lastname: Crooks